论文部分内容阅读
采用普通熔炼工艺制备的铝锂合金 ,锂的质量分数不超过 3 % ,否则 ,合金会出现严重的偏析。利用电磁模拟微重力装置 ,将原料放入涂有BN的高纯石墨坩埚并装入炉中 ,抽真空到 10Pa开始对炉体加热 ,温度达到 3 0 0℃时充入氩气 ,使炉内压力维持在 40Pa ,合金温度达到 760℃时停止加热 ,保温 40min ,在电磁铁中输入励磁电流并在熔体中加入直流电场 ,温度降至凝固温度时去掉电磁场 ,冷却至室温 ,可以制备出锂的质量分数为 5 %～ 10 %的二元铝锂合金。试验证明 :利用该方法解决了合金的偏析现象
The use of ordinary smelting process prepared aluminum lithium alloy, lithium mass fraction of not more than 3%, otherwise, the alloy will appear serious segregation. The use of electromagnetic simulation of micro-gravity device, the raw material into BN-coated high-purity graphite crucible and into the furnace, evacuated to 10Pa began to heat the furnace, the temperature reached 3000h argon filled, the furnace The pressure is maintained at 40Pa, the temperature stops when the alloy reaches 760 ℃ heating, holding 40min, the excitation current input in the electromagnet and the melt into the DC field, the temperature dropped to the freezing temperature to remove the electromagnetic field, cooled to room temperature, can be prepared lithium The mass fraction of 5% ~ 10% binary aluminum lithium alloy. Experiments show that: the use of the method to solve the segregation of the alloy